除草食动物之外,可以稳定阿尔卑斯山草原生物质的生产,跨越空间尺度
Juntao Zhu1,2, Yangjian Zhang1,2, Jianshuang Wu1,3,4,5
1Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
Global change biology
|January 26, 2024
概括
畜牧放牧对跨空间尺度和降水梯度的草原稳定性产生负面影响. 除了食草动物,提升了西藏高原的高山草原生物质生产稳定性.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 范围管理范围管理范围管理范围.
背景情况:
- 土地利用管理,特别是畜牧放牧,显著影响草原生态系统.
- 牧场在各种环境条件和空间尺度上对草原稳定性的影响尚未完全理解.
研究的目的:
- 调查除草动物排斥对高山草原生物质生产时间稳定性的影响.
- 为了确定这些影响是否随环境条件而变化,例如降水梯度.
- 评估放牧排斥如何影响局部和更大的空间尺度上的稳定性.
主要方法:
- 在西藏高原的9个地点进行了为期8年的草原排除实验.
- 该实验跨越了相当大的降水梯度,以捕捉不同的环境条件.
- 生物质生产稳定性在当地社区和地点 (更大的) 空间尺度上进行了分析.
主要成果:
- 排斥草食动物持续增加了阿尔卑斯山草原生物质生产的时间稳定性,无论是在当地还是现场规模.
- 当地社区的稳定性因主导物种的稳定性增加而增强.
- 较大规模的稳定性是由当地社区在生产力方面的更大的空间异步促进的.
- 较高的平均年降水与主导物种稳定性降低和草原总体稳定性相关.
结论:
- 畜牧放牧可能会损害草原的稳定性在各种空间尺度和气候梯度.
- 环境条件,特别是降水,调节牧场对草原稳定性的影响.
- 了解这些依赖规模和环境调节的影响对于有效的草原管理和保护至关重要.
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